Abstract: Leaflike shaft (1) of a hip-joint prosthesis for anchoring in the femur, according to a towards a distal end (5) [sic], with a femur-anchoring section (1a, . . . 1i) having a long axis (A) and with a prosthesis neck (2), wherein the femur-anchoring section 1a, . . . 1i) has a substantially rectangular external contour in a plane perpendicular to the long axis (A), optionally with recesses in the side edges and/or at the corners.

Abstract: A knee-joint prosthesis with a tibial part having a flat tibial bearing surface, with a bearing body that can be shifted thereon in the anterior-posterior direction and includes two concave bearing shells within which a femoral joint part can be movably seated, and with a rotational guide that permits rotation of the bearing body on the tibial bearing surface about an axis of rotation perpendicular to said surface. The rotation guide includes a steering rod that is seated at the bearing body so as to be pivotable relative thereto and at the tibial part is guided in the medial/lateral direction and/or rotationally guided.

Abstract: The kit for implanting a cementable endoprosthesis includes a fitting instrument and at least two components to be implanted, namely an endoprosthesis shaft and a proximal centering and/or sealing element, the shaft and the fitting instrument being designed to be able to be coupled to each other, and the centering and/or sealing element being designed to be placeable on the shaft and to be displaceable in the direction of extension of the latter, and either the fitting instrument including a limit stop part which forms a limit stop relative to the centering and/or sealing element, or a marking being arranged on the fitting instrument and on the shaft in order to ensure a defined mutual position between the centering and/or sealing element and the shaft.

Abstract: A device for localizing and executing resection cuts on the femur (1) for preparing an implantation of a total endoprosthetic knee joint is provided. The device includes a reference device (5) adapted to be releasably attachable to the femur (1) in the distal area of the femur (1). Alignment of the reference device (5) relative to the femur (1) should be accurately positionable. An adjustment device (10) is connected to the reference device (5). The adjustment device (10) is movable relative to the reference device (5) and is provided with a linearly movable base part (10g) for the attachment of an instrument (11, 14). A first drive device (5v, 21) linearly moves the adjustment device (10) relative to the reference device (5) in the direction (10b) of a first axis (X) of a system of coordinates (X, Y, Z). A second drive device (10f, 17) linearly moves the base part (10g) in the direction (10d) of another, second axis (Y) of said system of coordinates (X, Y, Z).

Abstract: Leaflike shaft (1) of a hip-joint prosthesis for anchoring in the femur, according to a towards a distal end (5) [sic], with a femur-anchoring section (1a, . . . 1i) having a long axis (A) and with a prosthesis neck (2), wherein the femur-anchoring section 1a, . . . 1i) has a substantially rectangular external contour in a plane perpendicular to the long axis (A), optionally with recesses in the side edges and/or at the corners.

Abstract: A joint base for a hip joint endoprosthesis includes an elongate base element and a base insert. The base element has a longitudinal axis and an outline which, in a front view, is of asymmetrical design at least relative to the longitudinal axis. The base insert has at a front side a semi-spherical hollow for accommodating a joint ball.

Abstract: Hip-joint endoprosthesis system with a plurality of, in particular leaflike, prosthesis shafts (1.1′, 1.2′) for anchoring in the femur, wherein each shaft expands substantially on all sides from a distal end (5) towards proximal and comprises an anchoring section with a shaft long axis (AS) that merges medially with an arch (7.1′, 7.2′) that continues into a prosthesis neck (9.1′, 9.2′) with a prosthesis-neck axis (AH), such that the shafts differ with respect to a reference-point distance (A1′, A2′, A3′) between the shaft long axis and a reference point (R1′, R2′, R3′) on the prosthesis neck axis, which identifies the position of the center point of a joint ball set onto the prosthesis neck, and such that that the length (l) of the projection of the overall extent of the prosthesis shaft from the distal end of the anchoring section to the reference point or to the proximal end of the prosthesis neck is the same in all prosthesis shafts.

Abstract: A femoral hip-joint prosthesis having a tapered stem for implantation by cement. The prosthesis has a collarless shoulder at a proximal end and a stem extending therefrom to a distal end in tapered fashion. A logarithmically extending curvature of anterior and posterior side faces of a first subsidiary section of the stem combine with straight converging lines of a second subsidiary section of the stem to uniformly distribute pressure in the prosthesis within the femoral hip bone.

Abstract: A femur slide has a patella shield and two convex curved condyle cups which are anteriorly rigidly joined by the patella shield. The two condyle cups and the patella shield define internally anterior and posterior matching surfaces which correspond with a femural ventral cut and with a femural dorsal cut. Relative to a reference plane which is defined by posterior slide surfaces of the condyle cups, an anterio-medial matching surface lies nearer to the reference plane than an anterio-lateral matching surface. The anterior matching surfaces are defined by a slanted surface with is continuously slanted in a direction from lateral to medial to posterior, and an angle between the slanted surface and the reference plane lies between three and ten degrees.

Abstract: The kit for implanting a cementable endoprosthesis comprises a fitting instrument (3) and at least two components to be implanted, namely an endoprosthesis shaft (4) and a proximal centering and/or sealing element (1), the shaft (4) and the fitting instrument (3) being designed to be able to be coupled to each other, and the centering and/or sealing element (1) being designed to be placeable on the shaft (4) and to be displaceable in the direction of extension of the latter, and either the fitting instrument (3) comprising a limit stop part (3e) which forms a limit stop relative to the centering and/or sealing element (1), or a marking (6) being arranged on the fitting instrument (3) and on the shaft (4) in order to ensure a defined mutual position between the centering and/or sealing element (1) and the shaft (4).

Abstract: Metal socket (10) for a joint endoprosthesis, the outer surface (11) of which comprises at least three circumferentially extending surfaces (12, 13, 14) of spherical segments each having a different radius (R1, R2, R3). A metal socket for a joint endoprosthesis has an outer surface which includes at least three circumferentially extending, outwardly convex surface regions each having a different radius. The outwardly convex surface regions are exclusively surfaces of spherical segments, centers of which lie on a common axis of rotation, such that a radius of a medial spherical-segment surface is smaller than a radius of a polar spherical-segment surface, but larger than a radius of an equatorial spherical-segment surface.

Abstract: An apparatus for supporting and correcting a skeletal structure includes at least two anchoring elements for a connecting element. The connecting element includes an elongate tensioning element that can be fixed to the anchoring element. Spacer sleeves can be slid over the tensioning element in order to keep adjacent anchoring elements a predetermined distance apart when a pulling force is applied to the tensioning element. Each anchoring element is attachable to a bone or vertebra. Surfaces of the anchoring elements against which the spacer sleeves abut are spherically curved. An end face at an end of each spacer sleeve towards the anchoring element has a shape complementary to an associated supporting surface of the anchoring element. The anchoring element has a passage for the tensioning element, wherein entrance and exit openings of the passage passing through the anchoring element each expand outward on all sides in a conical or trumpet-like shape.

Abstract: A tibia part of a knee joint prosthesis includes a tibia platform having a distal side, and an anchoring element. The anchoring element is arranged on the distal side of the tibia platform and attached to the tibia platform. In one embodiment, the anchoring element is formed by a shield having a height which is smaller than a width of the shield, and the shield has a U-, C- or V-shape as seen from the tibia platform.

Abstract: An implant for placing on a plateau or resection surface of a joint bone includes at least one skidshaped cup having a joint seating surface, a ventral and a dorsal end. The joint seating surface extends in a longitudinal direction and has first and second curvature radii. The first curvature radius is transverse to the longitudinal direction and, at least in a coronal area, larger than the second curvature radius transverse to the longitudinal direction and in an area, which is loaded when the joint is fully bent. The first curvature radius continuously merges into the second curvature radius within a transitional area which extends over an angular range between about 30.degree. and about 70.degree..

Abstract: A bone milling tool for precise preparation of bones includes a milling head connected to a driveshaft. The driveshaft simultaneously serves as a guide element which is guided in a bone. The bone milling tool further includes a toothing which is arranged on the milling head facing the driveshaft.

Abstract: An endoprosthetic knee joint has a femur portion, a tibia portion, and a coupling portion. The femur portion has a femur shaft having convexly curved condyle shells at a lower end, the shells having primary slide surfaces and two spaced apart side walls forming an intercondylar space. The tibia portion has a tibia shaft with a tibia plateau at an upper end, upon which are formed secondary slide surfaces. The tibia plateau has an axial recess. The coupling portion has a coupling pin rotatably housed in the recess, and a joint head at the upper end of the pin projects into the intercondylar space. The joint head has a bore extending transversely to the femur axis and is pivotally mounted by a coupling bolt which extends through the bore and is supported on the side walls of the condyle shells. A slide bush may be provided about the medial portion of the coupling bolt to enhance flexion/extension capability and varus/valgus movement.

Abstract: System to produce a knee-joint endoprosthesis with joint elements (10) are constructed to be attached to the lower end of the femur, and have a convexly curved joint bearing surface. Bearing elements (12) are constructed to be attached to the upper end of the tibia (11). A meniscus (14) is movably disposed between each femoral joint element (10) and tibial bearing element (12) and are provided on its upper and lower sides with sliding surfaces complementary in shape to the associated joint bearing surface of the femoral joint element (10) and the associated bearing surface of the tibial bearing element (12), respectively. The peripheral or sagittally outer boundary (16) of the sliding surfaces (15) of the menisci (14) that face the femoral joint elements (10) is higher than their central or sagittally inner boundary. The system is designed for modular, universally compatible supplementation to form a total knee prosthesis, revision prosthesis or femoropatellar joint prosthesis.

Abstract: A wrist prosthesis has a radial part and a metacarpal part (12). A joint connection (15) connects the radial and the metacarpal parts including shafts for placement in the metacarpal bone and the carpal regions. The joint connection (15) is biaxial and permits both dorsal/palmar flexion and radial/ulnar deflection. The radial/ulnar flexion has a swivel radius (R.sub.1). The dorsal/palmar flexion has a swivel radius (R.sub.2). The radius (R.sub.1) is greater than the radius (R.sub.2). The contacting joint surfaces are congruent in all relative positions. A separate collar is provided for slipping onto the shaft of the radial part. The collar has a conical taper, a roughened surface and longitudinal ribs.

Abstract: An endoprosthetic knee joint has a femur portion, a tibia portion, and a coupling portion. The femur portion has a femur shaft having convexly curved condyle shells at a lower end, the shells having primary slide surfaces and two spaced apart side walls forming an intercondylar space. The tibia portion has a tibia shaft with a tibia plateau at an upper end, upon which are formed secondary slide surfaces. The tibia plateau has an axial recess with a cross-section which expands toward the plateau from the depth of the recess on one side to a slot in the plateau. The coupling portion has a coupling pin rotatably housed in the recess, and a joint head at the upper end of the pin projects into the intercondylar space. During coupling of the parts of the prosthesis, the knee need not be stretched by the length of the coupling pin, but rather the pin can be introduced into the tibia portion by simple pivoting.

Abstract: An apparatus for stiffening and/or correcting part of the vertebral column consisting of at least two vertebral is disclosed. The apparatus includes at least two screw-shaped retaining devices (12), each of which is fixed to one of the vertebrae in the affected part of the vertebral column. A compression or distraction rod (32) connects the retaining devices (12) to one another. The compression or distraction rod (32) includes a rod-shaped connecting element (20) connected to the retaining devices (12). The rod-shaped connecting element has at least one distance element (34) and arranged and mounted on such element between the two adjacent retaining devices (12) so as to maintain the distance between these two retaining devices (12). The connecting element (20) at one end (36) has a screw thread (38) and at the other end (42) has either a screw thread (44) or, where appropriate, a flange-like portion (50) to fix in position or brace the retaining devices (12) and distance element (34, 34', 34", 34'", 34"").